Figure 2.

Capacity of the β-adrenoceptor agonists, isoprenaline and salbutamol to inhibit the release of eosinophil-activating cytokines from human airway smooth muscle cells stimulated by either (a,b) IL-1β (1 ng ml⁻¹) or (c) TNFα (10 ng ml⁻¹) for 24 h. Data are expressed as a per cent of the control response to either IL-1β (n=5 – 7) or TNFα (n=4) alone and represent mean±s.e.mean of duplicate values from independent experiments using cells cultured from different donors, cell passages 3 – 6. ^*P<0.05, ^**P<0.01, ^***P<0.001 compared to control by Bonferroni's t-test. NS P>0.05 by ANOVA.